47 C.F.R. § 87.25
Filing of applications
(a) [Reserved]
(b) An application must be filed with the Commission in accordance with part 1, subpart F of this chapter. Applications requiring fees as set forth at part 1, subpart G of this chapter must be filed in accordance with § 0.401(b) of the rules.
(c) One application may be submitted for the total number of aircraft stations in the fleet (fleet license).
(d)-(e) [Reserved]